Class Action Lawsuit Over GM 8-Speed Automatic Transmissions

New Class Action Lawsuit Over GM 8-Speed Automatic Transmissions

GM is getting hit with another legal claim over their eight-speed automatic transmissions, which allegedly contain defects requiring replacement of its internal components or full replacement.

As first reported by GM Authority, The eight-speed transmission problems allegedly can be traced back to an issue with the torque converter that causes excess friction. Additionally the lawsuit also cites more than 60 technical service bulletins and service updates put out by GM regarding the eight-speed transmission problems.


GM Eight-Speed Transmission Lawsuit

As a result of friction from the torque converter, metal shavings allegedly are distributed through the transmission. Over some time, according to the lawsuit, the metal shavings cause problems within the transmission. Many of the transmission components end up damaged and either require replacement or new transmission.

The lawsuit alleges that TSB documents are evidence GM was aware of problems with the transmission yet decided to sell those vehicles fitted with the eight-speed transmission anyway.

The class action suit filed against General Motors has requested that they change their warranties to address these transmission problems and also issue a recall for affected vehicles.

This class-action suit was filed against General Motors in the U.S District Court for Eastern Michigan, Southern Division.


Symptoms of Defective GM Eight-Speed Transmission

The following transmission symptoms have been alleged in the class action lawsuit:

  • Slipping, buck, kick, jerking
  • Harshly engage
  • Delay in downshifts
  • Sudden acceleration
  • Delayed acceleration
  • Difficulty stopping the vehicle
  • Suffer abnormal internal wear

General Motors Models Affected

The full list of affected GM vehicles in this class-action includes the following:

Owners experiencing problems with their GM eight-speed transmissions should document all dealings with service departments and keep all receipts. We will continue to provide updates as more news develops.


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View posts by Emily
Finder and reporter of automotive news & recalls.


  1. Avatar
    Kassandra CrossJanuary 14, 2022

    I have a 2019 Chevrolet Silverado 1500 LTZ and I have already had to take my truck to the dealership once for transmission issues a few months ago and I am having the same issues again. I bought my truck new June of 2020.

    1. Avatar
      ChristopherJanuary 15, 2022

      Thanks for adding your voice to this post Kassandra.


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